Mission Control Only Showing App Icons, NOT Windows

I just purchased a new MacBook Pro Retina and am noticing a bug with Mission Control. When I go to Mission Control to see all of the different windows I have open, it's showing just the app icons, NOT the actual app windows. This occurs sporadically; sometimes it works properly, and sometimes it doesn't. I actually realzied the same issue on my MacBook Pro (2009) after upgrading to Mountain Lion a few weeks ago, therefore it seems to be an OS issue and not a HW issue.

Here is a screen shot of what I see when Mission Control is not working properly:

Instead of those icons, it should be showing the actually windows within those apps that I have open.

10 minutes after posting my original comment, Mission Control started working properly. It's very sporadic. I think I closed Reminders and Messages right before I relalized Mission Control was back, but I'm not sure if this was just a coincidence, or part of the problem? Has anyone else seen this issue?

I'm having the same issue now. Sometimes works sometimes not. Since Lion update, this is the second time that it happens. The first time i don't remember what fixed. Weird. I don't have idea how to solve it.

I noticed by the icon in your dock that you had Messages open at the time you encountered this issue. I'm having the EXACT same problem as well and I think it has to do with the Messages app. Right before posting this I had messages open and no windows in Mission Control, but immediately after quitting Messages Mission Control works perfectly again.

Can you try your Mission Control with other apps + Messages and then again after you've quit Messages. I'm wondering if the issue is as predictable on your machine as it is on mine.

I have this problem too and would love a solution...when it happens to me it only seems to be on one of my spaces, if I use gestures to get to another space Mission Control" works fine on a different space, but if I go back to the original space it stops working..I have found a fix, which is just move the active window slightly, yep, that actually works, and then Mission Control starts working again...it's weird...would still love to know what causes it, even though the fix is an easy one...

Just on the safari comments above, I have noticed this happens when one of the tab has "reader" activated...turning of 'reader' seems to fix the issue with safari...

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